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chemical substances secreted by cells into the extracellular fluids that regulate metabolic function of other cells in the body
amino acid base or steroid
hormones can be classified chemically as
amino acid base
most hormones are
synthesized from cholesterol
gonadal and adrenocortical
of the hormones produced by the major endocrine organs, only ______ and _______ hormones are steroids
include leukotrienes and prostaglandins
biologically active lipids made from arachidonic acid
released by nearly all cell membranes
signaling chemicals that mediate inflammation and some allergic reactions
have multiple targets and effects ranging from raising blood pressure and increasing the expulsive uterine contractions of birth to enhancing blood clotting, pain, and inflammation
the effects of eicosanoids are typically: